Cargo aircraft



FIG. 1 is a perspective view of a cargo aircraft;

FIG. 2 is a top view of the cargo aircraft;

FIG. 3 is a bottom view of the cargo aircraft;

FIG. 4 is a left side view of the cargo aircraft;

FIG. 5 is a right side view of the cargo aircraft;

FIG. 6 is a front view of the cargo aircraft; and,

FIG. 7 is a rear view of the cargo aircraft. 

The ornamental design for a cargo aircraft, as shown and described. 